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Build 2017 - B8104 - The Future of C#

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We’re back! With C# 7.0 and Visual Studio 2017 just recently shipped, we paint the big picture: let’s lay out where the C# language and tooling experience is headed, and show early glimpses of what we’re currently working on.

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Build 2017 - B8104 - The Future of C#

  1. 1. @MadsTorgersen, @dcampbell
  2. 2. stackoverflow.com/insights/survey/2017#most-popular-technologies
  3. 3. stackoverflow.com/insights/survey/2017#most-loved-dreaded-and-wanted
  4. 4. F# 10,000’s Tens of thousands VB 100,000’s Hundreds of thousands C# 1,000,000’s Millions
  5. 5. F# 10,000’s Tens of thousands VB 100,000’s Hundreds of thousands C# 1,000,000’s Millions
  6. 6. F# 10,000’s Tens of thousands VB 100,000’s Hundreds of thousands C# 1,000,000’s Millions
  7. 7. F# 10,000’s Tens of thousands VB 100,000’s Hundreds of thousands C# 1,000,000’s Millions
  8. 8. Demos! More demos!
  9. 9. IAsyncEnumerable<Person> people = database.GetPeopleAsync(); foreach await (var p in people) { … } using await (IAsyncDisposable resource = await store.GetRecordAsync(…)) { … }
  10. 10. extension Enrollee extends Person { // static field static Dictionary<Person, Professor> enrollees = new Dictionary<Person, Professor>(); // instance method public void Enroll(Professor supervisor) { enrollees[this] = supervisor; } // instance property public Professor Supervisor => enrollees.TryGetValue(this, out var supervisor) ? supervisor : null; // static property public static ICollection<Person> Students => enrollees.Keys; // instance constructor public Person(string name, Professor supervisor) : this(name) { this.Enroll(supervisor); } }
  11. 11. class Person : IEquatable<Person> { public string First { get; } public string Last { get; } public Person(string First, string Last) => (this.First, this.Last) = (First, Last); public void Deconstruct(out string First, out string Last) => (First, Last) = (this.First, this.Last); public bool Equals(Person other) => other != null && First == other.First && Last == other.Last; public override bool Equals(object obj) => obj is Person other ? Equals(other) : false; public override int GetHashCode() => GreatHashFunction(First, Last); … } class Person(string First, string Last);
  12. 12. @roslyn @dcampbell @MadsTorgersen

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